Re: qemu-kvm-1.0 crashes with threaded vnc server?
On 13.03.2012 16:06, Alexander Graf wrote: On 13.03.2012, at 16:05, Corentin Chary wrote: On Tue, Mar 13, 2012 at 12:29 PM, Peter Lieven wrote: On 11.02.2012 09:55, Corentin Chary wrote: On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: Hi, is anyone aware if there are still problems when enabling the threaded vnc server? I saw some VMs crashing when using a qemu-kvm build with --enable-vnc-thread. qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp 7fec19d056d0 error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] I had no time to debug further. It seems to happen shortly after migrating, but thats uncertain. At least the segfault in libz seems to give a hint to VNC since I cannot image of any other part of qemu-kvm using libz except for VNC server. Thanks, Peter Hi Peter, I found two patches on my git tree that I sent long ago but somehow get lost on the mailing list. I rebased the tree but did not have the time (yet) to test them. http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip Feel free to try them. If QEMU segfault again, please send a full gdb backtrace / valgrind trace / way to reproduce :). Thanks, I have seen no more crashes with these to patches applied. I would suggest it would be good to push them to the master repository. Thank you, Peter Ccing Alexander, Ah, cool. Corentin, I think you're right now the closest thing we have to a maintainer for VNC. Could you please just send out a pull request for those? hi all, i suspect there is still a problem with the threaded vnc server. its just a guess, but we saw a resonable number of vms hanging in the last weeks. hanging meaning the emulation is stopped and the qemu-kvm process does no longer react, not on monitor, not on vnc, not on qmp. why i suspect the threaded vnc server is that in all cases we have analyzed this happened with an open vnc session and only on nodes with the threaded vnc server enabled. it might also be the case that this happens at a resolution change. is there anything known or has someone an idea? we are running qemu-kvm 1.0.1 with vnc: don't mess up with iohandlers in the vnc thread vnc: Limit r/w access to size of allocated memory compiled in. unfortunately, i was not yet able to reproduce this with a debugger attached. thanks, peter Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: qemu-kvm-1.0 crashes with threaded vnc server?
On 13.03.2012, at 16:05, Corentin Chary wrote: > On Tue, Mar 13, 2012 at 12:29 PM, Peter Lieven wrote: >> On 11.02.2012 09:55, Corentin Chary wrote: >>> >>> On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: Hi, is anyone aware if there are still problems when enabling the threaded vnc server? I saw some VMs crashing when using a qemu-kvm build with --enable-vnc-thread. qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp 7fec19d056d0 error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] I had no time to debug further. It seems to happen shortly after migrating, but thats uncertain. At least the segfault in libz seems to give a hint to VNC since I cannot image of any other part of qemu-kvm using libz except for VNC server. Thanks, Peter >>> Hi Peter, >>> I found two patches on my git tree that I sent long ago but somehow >>> get lost on the mailing list. I rebased the tree but did not have the >>> time (yet) to test them. >>> http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip >>> Feel free to try them. If QEMU segfault again, please send a full gdb >>> backtrace / valgrind trace / way to reproduce :). >>> Thanks, >>> >> I have seen no more crashes with these to patches applied. I would suggest >> it would be good to push them to the master repository. >> >> Thank you, >> Peter >> > > Ccing Alexander, Ah, cool. Corentin, I think you're right now the closest thing we have to a maintainer for VNC. Could you please just send out a pull request for those? Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: qemu-kvm-1.0 crashes with threaded vnc server?
On Tue, Mar 13, 2012 at 12:29 PM, Peter Lieven wrote: > On 11.02.2012 09:55, Corentin Chary wrote: >> >> On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: >>> >>> Hi, >>> >>> is anyone aware if there are still problems when enabling the threaded >>> vnc >>> server? >>> I saw some VMs crashing when using a qemu-kvm build with >>> --enable-vnc-thread. >>> >>> qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp >>> 7fec19d056d0 >>> error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] >>> qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp >>> 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] >>> >>> I had no time to debug further. It seems to happen shortly after >>> migrating, >>> but thats uncertain. At least the segfault in libz seems to >>> give a hint to VNC since I cannot image of any other part of qemu-kvm >>> using >>> libz except for VNC server. >>> >>> Thanks, >>> Peter >>> >>> >> Hi Peter, >> I found two patches on my git tree that I sent long ago but somehow >> get lost on the mailing list. I rebased the tree but did not have the >> time (yet) to test them. >> http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip >> Feel free to try them. If QEMU segfault again, please send a full gdb >> backtrace / valgrind trace / way to reproduce :). >> Thanks, >> > I have seen no more crashes with these to patches applied. I would suggest > it would be good to push them to the master repository. > > Thank you, > Peter > Ccing Alexander, -- Corentin Chary http://xf.iksaif.net -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: qemu-kvm-1.0 crashes with threaded vnc server?
On 11.02.2012 09:55, Corentin Chary wrote: On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: Hi, is anyone aware if there are still problems when enabling the threaded vnc server? I saw some VMs crashing when using a qemu-kvm build with --enable-vnc-thread. qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp 7fec19d056d0 error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] I had no time to debug further. It seems to happen shortly after migrating, but thats uncertain. At least the segfault in libz seems to give a hint to VNC since I cannot image of any other part of qemu-kvm using libz except for VNC server. Thanks, Peter Hi Peter, I found two patches on my git tree that I sent long ago but somehow get lost on the mailing list. I rebased the tree but did not have the time (yet) to test them. http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip Feel free to try them. If QEMU segfault again, please send a full gdb backtrace / valgrind trace / way to reproduce :). Thanks, I have seen no more crashes with these to patches applied. I would suggest it would be good to push them to the master repository. Thank you, Peter -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: qemu-kvm-1.0 crashes with threaded vnc server?
On 28.02.2012 09:37, Corentin Chary wrote: On Mon, Feb 13, 2012 at 10:24 AM, Peter Lieven wrote: Am 11.02.2012 um 09:55 schrieb Corentin Chary: On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: Hi, is anyone aware if there are still problems when enabling the threaded vnc server? I saw some VMs crashing when using a qemu-kvm build with --enable-vnc-thread. qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp 7fec19d056d0 error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] I had no time to debug further. It seems to happen shortly after migrating, but thats uncertain. At least the segfault in libz seems to give a hint to VNC since I cannot image of any other part of qemu-kvm using libz except for VNC server. Thanks, Peter Hi Peter, I found two patches on my git tree that I sent long ago but somehow get lost on the mailing list. I rebased the tree but did not have the time (yet) to test them. http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip Feel free to try them. If QEMU segfault again, please send a full gdb backtrace / valgrind trace / way to reproduce :). Thanks, Hi Corentin, thanks for rebasing those patches. I remember that I have seen them the last time I noticed (about 1 year ago) that the threaded VNC is crashing. I'm on vacation this week, but I will test them next week and let you know if I can force a crash with them applied. If not we should consider to include them asap. Hi Peter, any news on that ? sorry, i had much trouble debugging nasty slow windows vm problems last 2 weeks. but its still on my list. i'll keep you all posted. peter -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: qemu-kvm-1.0 crashes with threaded vnc server?
On Mon, Feb 13, 2012 at 10:24 AM, Peter Lieven wrote: > > Am 11.02.2012 um 09:55 schrieb Corentin Chary: > >> On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: >>> Hi, >>> >>> is anyone aware if there are still problems when enabling the threaded vnc >>> server? >>> I saw some VMs crashing when using a qemu-kvm build with >>> --enable-vnc-thread. >>> >>> qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp 7fec19d056d0 >>> error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] >>> qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp >>> 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] >>> >>> I had no time to debug further. It seems to happen shortly after migrating, >>> but thats uncertain. At least the segfault in libz seems to >>> give a hint to VNC since I cannot image of any other part of qemu-kvm using >>> libz except for VNC server. >>> >>> Thanks, >>> Peter >>> >>> >> >> Hi Peter, >> I found two patches on my git tree that I sent long ago but somehow >> get lost on the mailing list. I rebased the tree but did not have the >> time (yet) to test them. >> http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip >> Feel free to try them. If QEMU segfault again, please send a full gdb >> backtrace / valgrind trace / way to reproduce :). >> Thanks, > > Hi Corentin, > > thanks for rebasing those patches. I remember that I have seen them the > last time I noticed (about 1 year ago) that the threaded VNC is crashing. > I'm on vacation this week, but I will test them next week > and let you know if I can force a crash with them applied. If not we should > consider to include them asap. Hi Peter, any news on that ? -- Corentin Chary http://xf.iksaif.net -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: qemu-kvm-1.0 crashes with threaded vnc server?
Am 11.02.2012 um 09:55 schrieb Corentin Chary: > On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: >> Hi, >> >> is anyone aware if there are still problems when enabling the threaded vnc >> server? >> I saw some VMs crashing when using a qemu-kvm build with >> --enable-vnc-thread. >> >> qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp 7fec19d056d0 >> error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] >> qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp >> 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] >> >> I had no time to debug further. It seems to happen shortly after migrating, >> but thats uncertain. At least the segfault in libz seems to >> give a hint to VNC since I cannot image of any other part of qemu-kvm using >> libz except for VNC server. >> >> Thanks, >> Peter >> >> > > Hi Peter, > I found two patches on my git tree that I sent long ago but somehow > get lost on the mailing list. I rebased the tree but did not have the > time (yet) to test them. > http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip > Feel free to try them. If QEMU segfault again, please send a full gdb > backtrace / valgrind trace / way to reproduce :). > Thanks, Hi Corentin, thanks for rebasing those patches. I remember that I have seen them the last time I noticed (about 1 year ago) that the threaded VNC is crashing. I'm on vacation this week, but I will test them next week and let you know if I can force a crash with them applied. If not we should consider to include them asap. Peter > > > -- > Corentin Chary > http://xf.iksaif.net -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: qemu-kvm-1.0 crashes with threaded vnc server?
On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven wrote: > Hi, > > is anyone aware if there are still problems when enabling the threaded vnc > server? > I saw some VMs crashing when using a qemu-kvm build with > --enable-vnc-thread. > > qemu-kvm-1.0[22646]: segfault at 0 ip 7fec1ca7ea0b sp 7fec19d056d0 > error 6 in libz.so.1.2.3.3[7fec1ca75000+16000] > qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 7f06e0a30d71 sp > 7f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000] > > I had no time to debug further. It seems to happen shortly after migrating, > but thats uncertain. At least the segfault in libz seems to > give a hint to VNC since I cannot image of any other part of qemu-kvm using > libz except for VNC server. > > Thanks, > Peter > > Hi Peter, I found two patches on my git tree that I sent long ago but somehow get lost on the mailing list. I rebased the tree but did not have the time (yet) to test them. http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip Feel free to try them. If QEMU segfault again, please send a full gdb backtrace / valgrind trace / way to reproduce :). Thanks, -- Corentin Chary http://xf.iksaif.net -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
